If your blood pressure is consistently below 90/60 mmHg and causing symptoms like dizziness, fatigue, or fainting, several practical strategies can bring it up. The most effective options combine increased fluid and salt intake with simple physical techniques and lifestyle adjustments. A drop of just 20 mmHg in systolic pressure, say from 110 to 90, can be enough to make you lightheaded or faint, so even small improvements matter.
Drink More Water, Especially in Boluses
Drinking a large glass of water quickly is one of the simplest and most effective ways to raise blood pressure in the short term. Research from a Neurology study on older adults with low blood pressure found that drinking about 480 mL (roughly 16 ounces) of water within five minutes was the most effective non-drug intervention tested, outperforming compression stockings and physical maneuvers. The effect comes from your body’s response to rapid stomach expansion, which triggers a temporary increase in vascular resistance.
Making a habit of drinking water before standing up, before meals, and first thing in the morning can reduce the frequency of symptoms throughout the day. Aim for at least 2 to 3 liters of fluid daily unless you’ve been told otherwise.
Increase Your Salt Intake
Salt helps your body retain fluid, which increases blood volume and raises blood pressure. For people with orthostatic hypotension (blood pressure that drops when standing), medical guidelines typically recommend 2,400 to 4,000 mg of sodium per day, well above the 2,300 mg limit advised for the general population. Some guidelines for conditions like POTS go even higher, up to 4,800 mg daily.
Practical ways to add sodium include salting food more liberally, eating salty snacks like pretzels or olives, drinking broth, or using electrolyte tablets. One study found that adding about 2,400 mg of supplemental sodium per day for two months improved standing tolerance and blood vessel control in people who were prone to fainting. If you’re unsure how much sodium you’re actually getting, a 24-hour urine sodium test can give your doctor a clear picture.
Use Physical Counter-Pressure Techniques
When you feel symptoms coming on, specific muscle-tensing maneuvers can raise your blood pressure within seconds. These work by squeezing blood from your muscles back into circulation. Three techniques recommended by Cleveland Clinic:
- Leg crossing: Cross one leg over the other and squeeze the muscles in your legs, abdomen, and buttocks. Hold until symptoms pass.
- Arm tensing: Grip one hand with the other and pull them against each other without letting go. Hold as long as you can or until you feel better.
- Handgrip: Squeeze a rubber ball in your dominant hand for as long as possible.
These are especially useful when you’re stuck standing in line, getting up from a chair, or in any situation where you can’t sit down right away.
Eat Smaller, Lower-Carb Meals
Blood pressure naturally dips after eating because your body diverts blood flow to the digestive system. Large, carbohydrate-heavy meals make this worse. This post-meal drop, called postprandial hypotension, is a common trigger for dizziness and fatigue, particularly in older adults.
Switching from three large meals to six smaller ones spreads out the digestive demand and prevents sharp drops. Keeping carbohydrates lower at each meal also helps. Foods higher in protein and fat don’t trigger the same degree of blood pressure decline. If you notice your worst symptoms happen 30 to 60 minutes after eating, meal timing and composition are likely part of the problem.
Limit or Avoid Alcohol
Alcohol impairs your blood vessels’ ability to constrict when you stand up. Normally, your body tightens blood vessels in response to position changes to keep blood flowing to your brain. Research published in Circulation showed that after alcohol consumption, this constriction response essentially shut down in healthy volunteers, making blood pressure drops during standing significantly worse. If you already run low, even one or two drinks can be enough to trigger lightheadedness or fainting. Cutting back or eliminating alcohol is one of the more straightforward fixes.
Rethink Compression Garments
Compression stockings are frequently recommended for low blood pressure, but the evidence is surprisingly weak. A study in Neurology found that thigh-high compression stockings (23 to 32 mmHg) raised standing systolic blood pressure by only about 6 mmHg and were the least effective intervention tested, with just a 32% success rate. Abdominal compression belts performed notably better, raising standing blood pressure by about 10 mmHg with a 52% response rate.
If you’ve been wearing knee-high or thigh-high compression socks without much benefit, an abdominal binder may be worth trying instead. These wrap around your midsection and prevent blood from pooling in the large veins of your abdomen.
Adjust How You Move
Many blood pressure drops happen during transitions: getting out of bed, standing up from a chair, or standing for long periods. A few habit changes can reduce these drops significantly. Sit on the edge of your bed for 30 seconds before standing in the morning. Rise from chairs slowly and pause before walking. If you need to stand for a while, shift your weight, rock on your heels, or march in place to keep blood moving upward.
Sleeping with the head of your bed elevated 10 to 15 degrees (about 4 to 6 inches) can also help by reducing the dramatic pressure shift when you get up. This position encourages your body to retain a bit more fluid overnight rather than losing it through kidney filtration.
Medications for Persistent Low Blood Pressure
When lifestyle changes aren’t enough, several prescription options exist. The two most commonly used are midodrine, which tightens blood vessels, and fludrocortisone, which helps your body hold onto sodium and water. Both are effective but can cause blood pressure to rise too high when you’re lying down, which limits their use, especially at night.
A third option, pyridostigmine, works differently by improving the nerve signaling that regulates blood pressure when you stand. It tends to cause less of the lying-down blood pressure spike that the other two medications produce. Studies have found it moderately effective on its own and more powerful when combined with other medications. Your doctor can help determine which option fits your specific pattern of symptoms.
Signs Your Blood Pressure Is Dangerously Low
Low blood pressure only matters when it causes symptoms. Mild dizziness on standing is common and usually manageable. But if you experience confusion, blurred vision, cold or clammy skin, rapid shallow breathing, or fainting that doesn’t resolve quickly, your blood pressure may have dropped to a level that’s compromising blood flow to vital organs. Persistent or worsening symptoms, especially after starting a new medication, warrant prompt medical evaluation.